#!/bin/bash

# A simple script to update spec or dsc file
# very, very simple. I am happy about patches which handles multiple files with different version numbers
#
# (C) 2012 by <joerg.steffens@dass-it.de>
#  
# This program is free software; you can redistribute it and/or  
# modify it under the terms of the GNU General Public License  
# as published by the Free Software Foundation; either version 2  
# of the License, or (at your option) any later version.  
# See http://www.gnu.org/licenses/gpl-2.0.html for full license text.  


# defaults
MYVERSION=""
FILES=""

while test $# -gt 0; do
  case $1 in
    *-file)
      FILES="$FILES $2"
      shift
    ;;
    *-outdir)
      MYOUTDIR="$2"
      shift
    ;;
    *)
      echo Unknown parameter $1.
      echo 'Usage: set_version --version $VERSION --file $FILE --basename $BASENAME --outdir $OUT'
      exit 1
    ;;
  esac
  shift
done

if [ -z "$FILES" ]; then
  echo "ERROR: no inputs files are given via --file parameter!"
  exit 1
fi



get_version_from_file () {
  if [ -z "$MYVERSION" ]; then
    MYVERSION=`ls -1t | sed -n "s,$BASENAME.*-\([0123456789].*\).tar.*,\1,p" | head -n 1`
  fi
  if [ -z "$MYVERSION" ]; then
    MYVERSION=`ls -1t | sed -n "s,$BASENAME.*-\([0123456789].*\).tgz$,\1,p" | head -n 1`
  fi
  if [ -z "$MYVERSION" ]; then
    MYVERSION=`ls -1t | sed -n "s,$BASENAME.*-\([0123456789].*\).tbz2$,\1,p" | head -n 1`
  fi
  if [ -z "$MYVERSION" ]; then
    MYVERSION=`ls -1t | sed -n "s,$BASENAME.*-\([0123456789].*\).zip$,\1,p" | head -n 1`
  fi
  if [ -z "$MYVERSION" ]; then
    echo "ERROR: no version is given and can't get detected automatically"
    exit 1
  fi
  echo "Detected version as $MYVERSION"
}

write_files () {
  if [ -z "$FILES" ]; then
    FILES="*.spec *.dsc"
  fi
  if [ -z "$MYOUTDIR" ]; then
    echo "ERROR: no output directory is given via --outdir parameter!"
    exit 1
  fi

  for i in $FILES; do
    FILE=`ls -1 $i 2>/dev/null`
    [ -e "$FILE" ] || continue

    sed "0,/^Version:\(\s*\)[^%]*/s//Version:\1$MYVERSION/" "$FILE" > "$MYOUTDIR/$FILE" || exit 1
    echo "Updated first occurrence (if any) of Version in $FILE to $MYVERSION"
    if [ "${FILE%.spec}" != "$FILE" ]; then
      # set release back to zero after version upgrade, will be increased by OBS during build
      # also keep macros in release in case of fedora/mandriva
      sed -r -i "s,^Release:(\s*)[^%]*,Release:\10," "$MYOUTDIR/$FILE" || exit 1
   fi

    if [ "${FILE#_service:}" != "$FILE" ]; then
      # we can remove service files, no need to store them twice
      rm -f "$FILE"
    fi
  done
}

#get_version_from_file
#write_files

filesize()
{
	stat  --format='%s' $*
}

md5()
{
	md5sum $* | cut -f 1 -d ' '
}

export LANG=C

FILES_DSC="*.dsc"

# update the file list in the description file
for FILE_DSC in $FILES_DSC; do
	[ -e $FILE_DSC ] || continue
    printf "$0: modifing file $FILE_DSC, adding "
	grep -q "^Files:" $FILE_DSC || echo "Files: " >> $FILE_DSC
	for filename in $FILES; do
        path=`ls -1 "$filename" || ls -1 "_service:*:$filename"`
        printf "${path##*:} "
		printf ' %s %s %s\n' `md5 $path` `filesize $path` ${path##*:} >> $FILE_DSC
	done
    printf "\n"
done

exit 0